The Beatles started, and ended, their career with Phil Spector. Phil's (over)production of the Let It Be album is well documented. It is less well known that the Beatles performed a Phil Pector song on their first recording session: the Decca Audition, January 1st, 1962.
That recording suggests that Lennon (lead vocals) was not at his best; his voice is too low, and too soft. Perhaps he did not like the song ? Pete Best' drumming did not add to the excitment either.....

Here's an attempt to make the most of that same 1962 recording; double tracked vocals, strings & Horns (courtesy of Peter and Gordon (RIP)) turn it into a real Beatles track.

I prefer it over the session recorded in 1963 (BBC Paris), where they attempted more harmonies, but didn't succeed.